private void SetCurrentContext(CGContext ctx)
        {
            context = ctx;

            context.SetDefaultCTMSettings(Frame.Height);
            context.SetDefaultTextSettings();
        }
        private void DrawModel(CGContext context)
        {
            context.SetDefaultTextSettings();

            var number = 0;
            for (int j = cellCount - 1; j >= 0; j--)
                for (int i = 0; i < cellCount; i++)
                {
                    number++;
                    context.DrawDialogText(number.ToString(), Frame.X + i * cellWidth + cellContentLeft, Frame.Y + j * cellHeight + cellContentBottom, false);
                }
        }